impl linux credential storage

Signed-off-by: kernelkind <kernelkind@gmail.com>

src/lib.rs

@@ -33,6 +33,7 @@ mod user_account;
 #[cfg(test)]
 #[macro_use]
 mod test_utils;
+mod linux_key_storage;
 
 pub use app::Damus;
 pub use error::Error;